A scientometric review of geopolymer concrete

The drive towards sustainable construction materials that will reduce the amount of CO2 produced during the manufacture of Portland cement has led researchers to investigate the suitability of alternative materials in concrete production. The use of industrial and agricultural by-products such as fly ash, slag, rice husk ash, and natural pozzolanas high in aluminosilicate content have been found useful in the production of geopolymer concrete which has become a suitable replacement for OPC concrete with its higher strength, temperature stability, denser microstructure, higher bond strength, and resistance to chemicals. A holistic approach for the first scientometric review on geopolymer concrete is described in this study. The study embraced an all-inclusive review concept using scientometric analysis and science mapping technology, and comprehensive discussion to highlight the most influential publication sources, most used keywords, most active researchers and institutions, as well as literature with the highest impact on the field of Geopolymer concrete; to examine the current state-of-the-art research focus, and to identify the current research gaps. The study analyzed 2011 related bibliographic data mined from the Scopus database. The research gaps identified were in the areas of geopolymer type, materials, mix design, mechanical properties, durability properties, microstructure, and adoption and application. Further long-term studies are required in these areas to provide a basis for a regulatory framework for adoption of geopolymer concrete. This study will help researchers understand the current trend in geopolymer concrete, opening more room for further research as well as serve as a source of information for policy makers, journal editors, professionals and research institutions.